body{
    margin: 0;
    background-color: #eeeeee;
    font-size: 16px;
    font-family: "微软雅黑","幼圆", "宋体", sans-serif;
}
@media (max-width: 1200px) {
    .container{
        max-width: 1300px;
    }
}
.header{
    border-top: 3px solid black;
    border-radius: 0px;
}